Firas Naji, D.O.
Internal Medicine Physician · Irvine, CA
Firas Naji, D.O. is an internal medicine physician with a practice address in Irvine, California, and NPI 1578883997, issued on Jun 8, 2010. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Firas Naji
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 253997 MA
244291 MA
Self-reported in NPPES; status is on the state search - Practice location
- 17595 Harvard Ave Ste C-803, Irvine, CA 92614
- Phone
- (949) 981-5033
- Enumerated
- Jun 8, 2010
- Record last updated
- Nov 27, 2023
- Fax
- (949) 272-9976
- Medicaid ID
- 110099862A MA
- Medicare enrollment
- Enrolled (PECOS I20211130001221); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Firas Naji in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
132 Medicare Part D claims for 55 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- City OF Hope Medical FoundationIrvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Firas Naji among 17,696 internal medicine physician records in California
Firas Naji, D.O. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Grace Chang, M.D.Irvine, CA 926141992877625
- Denny Lee, MDIrvine, CA 926141740571835
- Maulik Majmudar, M.D.Irvine, CA 926141346395100
- Jeffrey Sudeith, M.D.Irvine, CA 926141649297383
- James Wang, M.D.Irvine, CA 926141639413123
- Susan Davoodifar, M.D.Irvine, CA 926121013287119
- Pamela Lawrence, M.D.Irvine, CA 926121336299734
- Marta Long, MDIrvine, CA 926121205860509
Common questions
What is Firas Naji, D.O.'s NPI number?
Firas Naji, D.O.'s National Provider Identifier (NPI) is 1578883997, issued on Jun 8, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Firas Naji, D.O. located?
The NPPES record lists a practice address at 17595 Harvard Ave Ste C-803, Irvine, CA, 92614. Phone: (949) 981-5033. Providers update this record themselves, so call before visiting.
How can I verify Firas Naji, D.O.'s license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Firas Naji, D.O. prescribe under Medicare Part D?
In 2024, Firas Naji, D.O. had 132 Medicare Part D claims for 55 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.